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Patient outcome with respect to HER2/HER3 and p21 status in HER2+ breast cancer treated with trastuzumab. Overall survival (a) and disease-free interval (b). HER2/HER3 + p21- (n = 13), Other groups: HER2/HER2 + p21 + , HER2/HER3- p21 + , HER2/HER3-p21- (n = 75). Time in months
